inside. >> we were moving down the hallway and we don't hea >>> the officer knocked out the glass at sandy hook so the other officers could get merchandise. >> we didn't see or hear anything. >> we could basically just smell gun powder. >> at what point did you realize what you were dealing with? >> immediately. once i got there i myself knew pretty much what was going on. we didn't have specific details yet. it was utterly shocking to anyone. there is no words that can describe. >> he and the other officers directed the students outside, shielding them. >> we didn't want them to see and i hope we did that. >> what did you say, officer? >> come on, guys, we're going to go. come on. we're just going to go outside. i remember thinking that they seemed less emotion -- emotional than me at the time. i kept telling them how brave they were, their names, try to keep their mind off everything that was going on around them. we were confident and believed that our actions did cause this incident to stop. >> do you believe he knew you were coming? >> in my heart i believe he was aware of our presenc